According to a recent survey conducted in North Carolina homes, reported The Washington Post, spiders were discovered in 100 percent of those homes tested, including 68 percent of bathrooms and more than three quarters of bedrooms.

With them all around us, especially in our homes, it’s no wonder we worry about what they do all day while we are away. Well, apparently, they eat. Most spiders feast on insects while larger spiders eat lizards, birds and even small mammals, according to the Washington Post.

Two European biologists, Martin Nyffeler and Klaus Birkhofer, decided to answer the question: How much does the entire spider population eat in a single year?

The pair published the study earlier this month and found that overall the world’s population of spiders consume around 800 million tons of prey in any given year. Together that amounts to at least as much meat as all 7 billion humans on the planet.

To put that in perspective, the total biomass of all adult humans on the Earth right now is estimated to around 287 million tons, according to the study. So, theoretically, the world’s entire population of spiders has the appetite to finish off the entire human race in just one year.

Before you worry about how many spiders are living under your bed in the dark spaces, though, keep in mind they have probably been there for a while and have not bothered you.

In fact, the study showed that if you placed the population of spiders in the world together, they would weigh around 25 million tons. The Washington Post reports, the Titanic only weighed 52,000 tons. So, basically the mass of every spider today added together weighs around 478 Titanics.

Because they eat around 10 percent of their body weight in food each day, that means less pests for you.

The San Francisco Chronicle and The Washington Post contributed to this article